Saturday, March 7, 2015

Oklahoma earthquake - M3.7 mid-depth thrust

I don't go by anything the discounters say, but I just look at the felt area. Shear earthquakes always show a narrow band, and shallow thrusts have a small felt area. This is a nice mid-depth thrust, which gives an intensity 5. OK is enjoying a little earthquake holiday now because of the Big Freeze.

Update: Followed by an M3.5 right on my thrust fault. It's been so long that I thought this thing was dead. Anyway, one of the highest Intensity to magnitude ratios. If they actually put in strong ground motion, it would be the highest PGV to M ratio.